PostgreSQL - How to find and kill a hanging query?
First, check all the processes that are running:
SELECT * FROM pg_stat_activity WHERE state = 'active';
So you can identify the PID of the hanging query you want to terminate, run this:
SELECT pg_cancel_backend(PID);
This query might take a while to kill the query, so if you want to kill it the hard way, run this instead:
SELECT pg_terminate_backend(PID);
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